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How long should I wait to use a flea collar after cat flea spray?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | 6 lbs

How long should I wait to put a Hartz Ultra Guard flea collar on my cat after spraying her with Hartz Ultra Guard Plus flea and tick spray?

1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on January 8th, 2020

I would not recommend repeating treatment with similar ingredients for at least a month, especially in cats which are very sensitive to overdosing. It is important to treat bedding and sleeping areas to kill eggs and larvae before they hatch. If problems persist contact your vet for oral treatment such as comfortis

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